/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase;

import org.apache.yetus.audience.InterfaceAudience;

/**
 * Used to merge CacheEvictionStats. Thread safe for concurrent accessing.
 */
@InterfaceAudience.Private
public class CacheEvictionStatsAggregator {

  private final CacheEvictionStatsBuilder builder;

  public CacheEvictionStatsAggregator() {
    this.builder = new CacheEvictionStatsBuilder();
  }

  public synchronized void append(CacheEvictionStats stats) {
    this.builder.append(stats);
  }

  public synchronized CacheEvictionStats sum() {
    return this.builder.build();
  }
}
